Method and device for identifying contactless gestures

摘要

Methods and devices for identifying contactless gestures are described. In one example, the present disclosure describes a method of detecting a contactless gesture on an electronic device. The electronic device has an electromagnetic radiation transmitter and an electromagnetic radiation receiver. The electromagnetic radiation receiver is configured for receiving electromagnetic radiation emitted from the electromagnetic radiation transmitter and reflected by an object. The method includes: monitoring an amplitude of received electromagnetic radiation at the electromagnetic radiation receiver; detecting a proximity event by comparing the amplitude to a predetermined proximity threshold; after detecting the proximity event, continuing to monitor the amplitude of the received electromagnetic radiation at the electromagnetic radiation receiver; and, in response to detecting the proximity event, performing an analysis on the received electromagnetic radiation to determine whether the received electromagnetic radiation indicates a predetermined gesture.

主权项

1. A method of detecting a contactless gesture on an electronic device, the electronic device having an electromagnetic radiation transmitter and an electromagnetic radiation receiver, the electromagnetic radiation receiver configured for receiving electromagnetic radiation emitted from the electromagnetic radiation transmitter and reflected by an object, the method comprising:
monitoring an amplitude of received electromagnetic radiation at the electromagnetic radiation receiver; detecting a proximity event by comparing the amplitude to a proximity threshold; after detecting the proximity event, continuing to monitor the amplitude of the received electromagnetic radiation at the electromagnetic radiation receiver; and, in response to detecting the proximity event, performing an analysis on the received electromagnetic radiation indicates a first gesture comprises:
detecting a peak amplitude event based on the amplitudes of the received electromagnetic radiation monitored after the proximity event;determining a measure of the rate of change of the amplitude or received electromagnetic radiation before the peak amplitude event;determining a measure of the rate of change amplitude of received electromagnetic radiation after the peak amplitude event; anddetermining whether the received electromagnetic radiation indicates the first gesture based on the measure of the rate of change of the amplitude of received electromagnetic radiation before the peak amplitude event and the measure of the rate of change of the amplitude of received electromagnetic radiation after the peak amplitude event.